Question

Possible Duplicate:
Deleing Multiple Rows Using Checkboxes, PHP and MySQL

I wonder whether someone may be able to help me please.

I’m trying to put together a script which creates a form which gives the user the ability to delete a record via the selection of a checkbox and then pressing a ‘submit’ button.

From reading through many articles, I’ve put together the following script which is the section of code that builds the table, checkboxes and submit button.

 <?php

$query = "SELECT  l.*, COUNT(f.locationid) totalfinds FROM detectinglocations l LEFT JOIN finds f ON f.locationid = l.locationid WHERE l.userid = '$idnum' GROUP BY l.locationname";

$result=mysql_query($query);

$count=mysql_num_rows($result);
?>

<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="del" id="del" action="deletelocation.php" method="post">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF">&nbsp;</td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Lastname</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Email</strong></td>
</tr>

<?php
while($rows=mysql_fetch_array($result)){
?>

<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['locationid']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['locationid']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['locationname']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['returnedaddress']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['totalfinds']; ?></td>
</tr>

<?php
}
?>

<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input type="submit" value="Delete" /></td>
</tr>
</table>
</form>
</td>
</tr>
</table>

The code below, then deals with the deletion of the record.

<?php

$del_id = $_POST['checkbox']; 

for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $detectinglocations WHERE locationid='$del_id'";
$result = mysql_query($sql);
}


?>

The correct information is retrieved and shown in the form table, but the problem I’m having is that I’m unable to get the deletion of the record to work. I’ve run this through JavaScript Console, but unfortunately I don’t receive an error message which may help me to solve the problem.

I just wondered whether someone could possibly take a look at this please and let me know where I’m going wrong.

Answer 1

Change your PHP code as below

$del_id = $_POST['checkbox']; 
$detectinglocations = 'your database table name';

foreach($del_id as $value){
   $sql = "DELETE FROM ".$detectinglocations." WHERE id='".$value."'";
   $result = mysql_query($sql);
}